What is the SD Speed Class?
The SD Association has established specifications that rate the minimum data transfer in SD, SDHC, SDXC, SDHC UHS-I and SDXC UHS-I memory cards and host products. The speed rate specifications were established based on the needs of movie and video companies. Video recording requires certain writing speeds when recording the data onto an SD card. The SD Speed Class and UHS Speed Class standardized the specification for both card and host devices in order to guarantee minimum writing speeds.
The SD Association has established standards that rate the minimum data transfer in SD, SDHC, SDXC, SDHC UHS-I and SDXC UHS-I memory cards and devices. The speed reates were established based on the needs of movie and video companies because video recording requires certain writing speeds when recording the data onto a memory card. The SD Speed Class and UHS Speed Class standardized the specification for both memory cards and devices in order to guarantee minimum writing speeds and deliver the best performance.
